Originally Posted by: Valtekken173 
I would hope MS and Turn 10 would warn us well in advance of any delisting honestly. I can't even get all the Forza rewards for this game because of the lack of Spotlight events.
If you are talking about something like medals, I've gotten all the medals for forza rewards and as far as I know I've only done the base game and premium content.
The premium content also has a few more events that while hard might be more easy to platinum. I've gotten 5 platinums from them.
If you get the premium content, it is enough to get all achievements and forza rewards.